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Ceiling cracks

Straight line cracking in ceilings, or gaps between ceilings and external walls are often NOT associated with subsidence and settlement.

Instead they often occur due to bulging or leaning walls and what Engineers call ‘lack of lateral restraint’. Many side (flank) walls are essentially high free standing walls at their mid length position as floor joists tend to pass parallel to such walls. Staircase voids are also often located against flank walls. This means that over 10’s of years, lots of small expansion and contraction forces allow the wall to move outwards slightly, and there is nothing to hold it in place.

In this instance a 9″ thick, three storey high wall leant over by more than 6″ and we had to devise a serious system of lateral restraint ties to prevent rebuilding the entire wall.

Posted in Surveys/ Reports

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Pole Structural Engineers, Admel House,
24 High Street , Wimbledon Village, London SW19 5DX
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